Experimental and Eulerian-Lagrangian numerical investigation on cavitation erosion characteristics in Venturi pipes with different divergent angles
Ultrasonics Sonochemistry,
Год журнала:
2025,
Номер
114, С. 107278 - 107278
Опубликована: Фев. 16, 2025
Hydrodynamic
cavitation
(HC)
is
widely
found
in
fluid
machinery
and
has
emerged
as
a
significant
technology
several
engineering
fields.
To
investigate
the
erosion
characteristics
caused
by
HC,
experimental
tests
under
varying
conditions
are
conducted
this
study
using
Venturi
test
section
with
different
divergent
angles.
The
qualitative
risk
distributions
represented
through
paint
experiments,
showing
that
increases
angle
decreases.
Subsequently,
Eulerian-Lagrangian
multiscale
model
adopted
to
simulate
HC
section.
This
directly
resolves
large-scale
cavities
volume
of
(VOF)
method
simultaneously
tracks
sub-scale
discrete
bubbles
bubble
(DBM).
A
modified
aggressive
indicator
[Li
et
al.,
Int.
J.
Mech.
Sci.
262,
108,735
(2024)]
incorporated
into
account
for
power
produced
behaviors,
thereby
reproducing
distribution
risks.
Simulations
corresponding
conducted,
results
show
simulated
features
align
well
observations.
Furthermore,
predicted
present
agree
tests,
confirming
reliability
our
model.
Язык: Английский
Cavitation erosion risk on a hydrofoil using a multi-scale method
Physics of Fluids,
Год журнала:
2025,
Номер
37(2)
Опубликована: Фев. 1, 2025
The
present
study
employs
a
two-way
coupled
multi-scale
method
to
simulate
and
analyze
the
cloud
cavitation
flow
around
hydrofoil,
based
on
which
distribution
of
erosion
risk
hydrofoil
is
evaluated.
numerical
results
demonstrate
that
can
capture
not
only
overall
evolution
characteristics
but
also
generation,
growth,
collapse
small-scale
bubbles.
Throughout
majority
cycle,
scale
Lagrange
bubbles
roughly
follows
logarithmic
Gaussian
distribution.
However,
it
shows
double-peak
characteristic
as
result
bubble
production
from
both
sheet
cavity
shedding
cloud.
local
risk,
closely
aligned
with
experimental
findings,
assessed
greatest
near
closure
line
cavity,
due
breakdown
vapor
structures
during
development
reentrant
jet.
During
highest
when
forms
decreases
moves
downstream.
analysis
reveals
number
alone
insufficient
for
characterizing
its
erosive
effects.
For
given
number,
mean
diameter
increases
inflow
velocity.
Furthermore,
total
impact
energy
power-law
dependence
Язык: Английский
LES investigation of oblique inflow effects on propeller cavitating tip vortex
Ocean Engineering,
Год журнала:
2025,
Номер
325, С. 120868 - 120868
Опубликована: Март 7, 2025
Язык: Английский
Investigation of cavitating jet erosion using Eulerian–Lagrangian modeling
International Journal of Mechanical Sciences,
Год журнала:
2025,
Номер
unknown, С. 110457 - 110457
Опубликована: Июнь 1, 2025
Язык: Английский
Quantitative evaluation on the cavitation damage energy of metals via multiscale approaches
Journal of Materials Research and Technology,
Год журнала:
2024,
Номер
32, С. 2086 - 2100
Опубликована: Авг. 14, 2024
Язык: Английский
Mechanism of multiscale cavitation induced pressure pulses on a propeller
Physical Review Fluids,
Год журнала:
2024,
Номер
9(11)
Опубликована: Ноя. 19, 2024
This
study
explores
the
evolution
characteristics
of
pressure
pulses
caused
by
cavitating
flow
around
a
highly-skewed
propeller.
The
fluctuation
law
low-frequency
propeller
is
mainly
determined
rotational
motion
propeller,
which
less
affected
cavitation.
occurrence,
rupture,
shedding,
and
collapse
vapor
cavity
will
promote
significant
increase
in
medium
high
frequency
pressure.
Most
notably,
fragmentation
shedding
small-scale
cavities
can
cause
peaks
mid-frequency
region.
Meanwhile,
microbubbles
lead
to
fluctuating
at
decreased
rate
6
dB
per
octave.
Язык: Английский